Species in the B. paludinella group have rather large shells for the genus (2.8-5.6 mm in length), with depressed spire and broad, thickened inner lip. Penis simple. Found in the western part of the middle north coast of Tasmania.
This species differs from species of the group with respects to its narrower radula, its mantle cavity with fewer ctenidial filaments and osphradium with simple anterior end, and male genital system with a pallial vas deferens with strong anterior undulations and long, tapering distal end of penis (short in other taxa). Furthermore, it has a female genital system with a single bend in proximal coiled oviduct and narrow (not pyriform) seminal receptacle.
Beddomeia petterdi Ponder & Clark, 1993
Class Gastropoda
Infraclass Caenogastropoda
Order Littorinida
Suborder Rissoidina
Superfamily Truncatelloidea
Family Beddomeiidae
Original name: Beddomeia petterdi Ponder & Clark, 1993. In Ponder, W.F., Clark, G.A., Miller, A.C. & Toluzzi, A. (1993). On a major radiation of freshwater snails in Tasmania and eastern Victoria: a preliminary overview of the Beddomeia group (Mollusca: Gastropoda: Hydrobiidae). Invertebrate Taxonomy 7: 501-750.
Type locality: Small tributary of Blythe River on South Riana Road, northern Tasmania (note that this site is now compromised by upstream impoundment- Karen Richards pers. comm.).
Under stones in pools. The white egg capsules are laid on the undersides of rocks and are like those of other species of Beddomeia - dome-shaped, with broad attachment base, covered with minute, mainly white sand grains and other fragments and containing a single egg. Development direct.
This taxon is known from the Blythe River, Tasmania.
All species of Beddomeia are geographically isolated and have restricted ranges.
This species is on the Tasmanian Threatened Species Protection Act 1995 as Endangered.
Ponder, W. F., Clark, G. A., Miller, A. C. & Toluzzi, A. (1993). On a major radiation of freshwater snails in Tasmania and eastern Victoria: a preliminary overview of the Beddomeia group (Mollusca: Gastropoda: Hydrobiidae). Invertebrate Taxonomy 7: 501-750.
